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Method for recovering fine clean coal

Patent ·
OSTI ID:6163843

This patent describes a heavy medium low specific gravity method for recovering coarse coal and fine coal and coal-bearing particles from a raw coal feed containing particles of coarse coal, fine coal, coal bearing particles, coarse shale and fine shale within a size range of 3.81 cm x 0 to which an amount of at least one heavy medium taken from the group consisting of mangnetite ore and ferrosilicon is added to form a slurry having a specific gravity between 1.27 and 1.70, which slurry is treated in at least one cyclone to separate substantially all the coarse coal, a substantial portion of the fine coal and a major amount of the heavy medium as a cyclone overflow from substantially all the coarse shale, the remaining portion of the fine coal, coal-bearing particles, fine shale and the remaining portion of the heavy medium as a cyclone underflow, treating the cyclone on at least one sieve bend and vibrating screen to separate and recover all the coarse coal as a first screen overflow from the fine coal and heavy medium as a first screen underflow.

Assignee:
NOV; NOV-89-053241; EDB-89-075605
Patent Number(s):
US 4802976
OSTI ID:
6163843
Country of Publication:
United States
Language:
English

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Related Subjects

01 COAL, LIGNITE, AND PEAT
010300* -- Coal
Lignite
& Peat-- Preparation-- (1987-)
CARBONACEOUS MATERIALS
CHALCOGENIDES
COAL
COAL FINES
COAL PREPARATION
CONCENTRATORS
CYCLONE SEPARATORS
DENSITY
DISPERSIONS
ELEMENTS
ENERGY SOURCES
EQUIPMENT
FLOTATION
FOSSIL FUELS
FUEL SLURRIES
FUELS
HEAVY MEDIA SEPARATION
INERTIAL SEPARATORS
IRON
IRON COMPOUNDS
IRON ORES
IRON OXIDES
MAGNETIC FIELDS
MAGNETITE
MATERIALS
METALS
MINERALS
MIXTURES
ORES
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
PARTICLES
PARTICULATES
PHYSICAL PROPERTIES
POLLUTION CONTROL EQUIPMENT
RECOVERY
RECYCLING
ROCKS
SEDIMENTARY ROCKS
SEMIMETALS
SEPARATION EQUIPMENT
SEPARATION PROCESSES
SHALES
SILICON
SIZE
SLURRIES
SUSPENSIONS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS